MN
Martha Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Martha Nelson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Alexander & Alfred — first a daughter (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nelson |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Cotton Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1360 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Stenographer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1909 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Alexander Nelson | Head | — | 80 | ~1860 |
| G Nelson | Son | — | 35 | ~1905 |
| Martha Nelson | Daughter | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Daughter, age 10
Cook, Illinois · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 20
Cook, Illinois · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Sales Girl |
| Industry | Chain Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 65 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 31
Cook-County, Illinois · implied b. ~1909 — 3 household members
| Surname | Nelson |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Stenographer |
| Industry | Cotton Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1360 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Martha Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alexander Nelson (~0.92 confidence) and father Alfred Nelson (~0.92 confidence) and mother Ida Nelson (~0.92 confidence) and mother Ida Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Nelson
b. ~1860
Source father
● Household
· direct · ~0.92
Father
Alfred Nelson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Ida Nelson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Ida Nelson
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Nelson
Daughter · 1940 · age 31 · b. ~1909 · Illinois
★ You are viewing this record
Sibling
G Nelson
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00978-00171)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alexander Nelson | 80 | Head | Retired | Sweden |
| 42 | G. Luther Nelson | 35 | Son | Real Estate & Insurance | Illinois |
| 43 | Martha Nelson THIS PERSON | 31 | Daughter | Stenographer | Illinois |
| 44 | Charles Larsen | 68 | Head | — | Illinois |
| 45 | Melvin Larsen | 60 | Brother | — | Illinois |
| 46 | Henry Allegretti | 46 | Head | Manager | Illinois |
| 47 | Gabrielle Allegretti | 41 | Wife | Salesclerk | Illinois |
| 48 | Rose Allegretti | 18 | Daughter | Hair Dresser | Illinois |
| 49 | Henrietta Allegretti | 16 | Daughter | — | Illinois |
| 50 | Gabriella Allegretti | 14 | Daughter | — | Illinois |
| 51 | Andrew Allegretti | 12 | Son | — | Illinois |
| 52 | Michael Allegretti | 76 | Father-in-law | — | Italy |
| 53 | Harvey Broadbent | 37 | Head | Tailor | Illinois |
| 54 | Anna Broadbent | 35 | Wife | Salesclerk | Illinois |
| 55 | Frank Pedote | 62 | Father-in-law | — | Italy |
| 56 | James Pedote | 43 | Head | Laundry Salesman | Italy |
| 57 | Jean Pedote | 29 | Wife | — | Canada-English |
| 58 | John Padula | 41 | Head | Delivery Truck | Illinois |
| 59 | Rose Padula | 35 | Wife | — | Illinois |
| 60 | Robert Padula | 10 | Son | — | Illinois |
| 61 | John Padula | 7 | Son | — | Illinois |
| 62 | Sam Pacelli | 26 | Head | Fender Repairman | Illinois |
| 63 | Ann Pacelli | 26 | Wife | — | Illinois |
| 64 | Mary Allegretti | 54 | Mother-in-law | — | Italy |
| 65 | Salvatore Valente | 33 | Head | Post Office Clerk | Illinois |
| 66 | Rose Valente | 29 | Wife | — | Illinois |
| 67 | Peter Valente | 7 | Son | — | Illinois |
| 68 | Anna Maria Passarrella | 83 | Grand-mother | — | Italy |
| 69 | Rocco Tamburrino | 64 | Head | — | Italy |
| 70 | Arcangel Tamburrino | 55 | Wife | — | Italy |
| 71 | Carl Tamburrino | 32 | Son | Solicitor | Illinois |
| 72 | Nicholas Tamburrino | 29 | Son | Solicitor | Illinois |
| 73 | Rosa Tamburrino | 28 | Daughter-in-law | — | Illinois |
| 74 | Joseph Tamburrino | 38 | Head | Delivery Truck Chauffeur | Italy |
| 75 | Anna Tamburrino | 35 | Wife | — | Italy |
| 76 | Mary Ann Tamburrino | 10 | Daughter | — | Illinois |
| 77 | Frank Rapisarda | 55 | Head | Bench Worker | Italy |
| 78 | Pauline Rapisarda | 53 | Wife | — | Italy |
| 79 | Joseph Rapisarda | 26 | Son | Nickel Plater | Italy |
| 80 | Carmello Rapisarda | 20 | Son | Wire Former | Illinois |
Pedigree Summary
Martha + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)